Window-sash fastener



Filed May 13, 1929 IN V EN TOR 1 11% ATTORNEY Patented June 17, 1930 UNITED STATES PATEN ALBERT A. POTTERF, OF KANSAS CITY, MISSOURI WINDOW-SASH FASTENECR Application filed May 13, 1929.

My invention relates to improvements in window sash fasteners.

One of the objects of my invention is to provide a novel sash fastener which is adap ed to be mounted a slidable sash and to engage a jamb of the window so as to firmly hold the sash from being lifted or from being lowered from a position to which the sash may be adjusted.

Still another object of my invention is to provide a novel sash fastener of the kind described, which is simple, cheap to make, strong, durable, not likely to get out of order, which is eflicient in operation, and which can be readily and quickly applied to a window sash.

The novel features of my invention are hereinafter fully described and claimed.

In the accompanying drawing, which illustrates my invention,

Fig. l is a reduced side elevation of a sash, partly broken away, provided with my improved fastener.

Fig. 2 is an elevation looking at the j amb 5 engaging edge of a portion of a sash provided with my improved fastenen.

Fig. 3 is an enlarged vertical sectional view of a portion of a window sash, a portion of the adjacent jamb and my improved fastener shown engaged with the sash and, in dotted lines, being shown engaged with the jamb.

Fig. 4 is a view similar to Fig. 3 showing one of the cams, in solid and dotted lines respectively, disposed in its two jamb engaging positions.

Fig. 5 is a View similar to Fig. 4 showing one of the cams engaged with the jamb and the other disengaged therefrom.

4 Fig. 6 is a side elevation of my improved fastener showing one of the cams in the jamb engaging position.

ig. 7 is an enlarged section on the line 77 of Fig. 6.

Fig. 8 is an enlarged section on the line 88 of Fig. 6.

Fig. 9 is an enlarged perspective view of one of the cams shown in Figs. 3, 4 and 5. Fig. 10 is a perspective view, enlarged, of a modified form of cam, the same being Serial No. 362,497.

Iclircular with an eccentrically disposed shaft ole. I

Similar characters of reference designate similar parts in the different views.

My improved sash fastener is provided wlth a support comprising a channel member l which is adapted to be fitted, with its flanges disposed vertically and extending to the outer edge of a sash stile 2, in a recess 3 provided in said edge. 2.

The flanges of the channel member 1 are provided with alined transverse holes in which is osoillatively fitted a shaft 4, which is square in cross section, and which is adapted to have its inner end portion extend through a hole in the sash, the inner end of the shaft 4 having a crank arm 5 by which the shaft may be swung to and from a fastening position. I

Two cams 6 of like size and shape, each ha'ving a square hole 7 therethrough are loosely mounted on the shaft 4, the holes 7 being slightly larger that the shaft 4, so that the cams 6 may tilt laterally and have a 'limited oscillative movement independently of. each other on-and withrespect to the shaft v4.

Each cam 6 has a flattened edge 8, which, when the shaft 4 .and crank arm 5 are in the positions shown in Figs l and 3, is flush with the adjacent edge of the sash stile 2, and the sash is free to move upwardly or downwardly. The cams 6 shown in Figs. 3 to 9 are ellipsoidal with the holes 7 eccentrically disposed.

To hold the sash from downward move ment, the crank arm 5 is swung downwardly from the horizontal to the position shown in Figs. 6, 7 and 8. The cams 6 will then be disposed as shown in Figs. 6, 7 and 8 and in solid lines in Fig. 4, and will be operatively engaged with the window jamb 8.

To hold the sash from upward movement, the crank arm 5 is swung upwardly to the position shown in dotted lines in Fig. 6. The cams 6 will then be in the positions shown in dotted lines in Figs. 3 and 4.

By having two cams of like size and shape and similarly disposed on the shaft 4, and loosely fitted on the shaft, the cams are adapted for better engagement witha rough surfaced jamb than would be the case with a single cam rigidly fastened to the shaft, as in the latter case, there would be but a single place of contact, while with the cams adapted for lateral tilting and limited oscillative movement on the shaft independently of each other, the cams will accommodate themselves on the shaft to the roughened uneven surface of a jamb, and will both tightly bear against the jamb.

The sash fastener is adapted for use on 6 both the upper and lower sashes, as shown of my invention. What I claim is in Fig. 1.

Fig. 6, the upper sash will be held from being lowered. By turning the crank arm 5 of thelower sash to the dotted position,

shown in Fig. 6, the lower sash can not be raised from the closed position. v r The form of cam 9, Fig. 10 is'circular with the shaft hole 7 disposed eccentrically. Cams of this form are disposed on the shaft 4 in the same manner as has been described with reference to the cams 6, and operate similarly.

I do not limit-my invention to the structure shown and described, as modifications, within the scope of the appended claim, may be made without departing from the spirit In a window sash fastener, a support adapted to be fastened to'awindow sash, a shaft oscillative on said support, and a cam looselymounted on and havingv means engaging said shaft bywhich'the cam may tilt laterally and have a limited oscillative movement with respect to theshaft', and

adapted to be moved by said shaft to and from a position in which the cam will engage a ,jamb associated with said sash;- V

In testimonywhereof I have signed my 'f name to this specification.

ALBERT A. POTTERF.

By turning the crank arm'5 of the upper sash downwardly as shown in solid lines in 

